The experimental junk mill was fabricated at the Denimex Repair & Maintenance Workshop, using advanced technologies and materials of Dynalloy Industries Inc., USA:
This junk mill was later used in one of the wells in Poltava region for milling out of a metal junk (see the photos of the newly made tool above and and after use - below).
Main operation parameters:
a) Axial load - 2.800 - 3.620 mt.
b) RPM - 40/60.
c) Footage per run - 77'.
d) Downhole operating time - 53 hours.
e) Wearout after POOH - 20%.